Set of NEW Truett & Osborn STROKER PISTONS with RINGS, PINS, KEEPERS for use in all 1937 & later Harley 45 & Servi-Car motors. Available in all sizes from standard bore to .080" oversize.Use these shorter skirt Pistons with our T&O Stroker Flywheels in your custom fitted flathead Harley 45 motor for lots of new horse power!Order our special Stroker Flywheels & Rod Sets for use with these Pistons